SANS Digital Forensics and Incident Response Blog: Category - Evidence Analysis

Metadata distributions in Computer Forensics

After my previous post, on using uid and gid distributions to spot malicious code on *nix file systems, I took to working on some code to convert *nix "modes" (The Sleuth Kit bodyfile refers to file type and permission information as mode) from fls bodyfiles to their octal representations and then to calculate averages and … Continue reading Metadata distributions in Computer Forensics


Digital Forensics: UID and GID distributions

On Unix and Linux systems each file has a user id and a group id, uid and gid respectively, showing the file's owner and group. On most *nix systems files in system directories are uid and gid root, which is represented by the numeric uid and gid value of 0, see the sample listing below: … Continue reading Digital Forensics: UID and GID distributions


Digital Forensic SIFTing: SUPER Timeline Creation using log2timeline

This is a series of blog articles that utilize the SIFT Workstation. The free SIFT workstation, can match any modern forensic tool suite, is also directly featured and taught in SANS' Advanced Computer Forensic Analysis and Incident Response course (FOR 508). SIFT demonstrates that advanced investigations and responding to intrusions can be accomplished using cutting-edge … Continue reading Digital Forensic SIFTing: SUPER Timeline Creation using log2timeline


Log2timeline Plugin Creation

About a year ago, I needed to add an Apache log to a supertimeline I was working on. I wrote a bash script to do this, as I was not familiar with perl at the time. I later went back and learned some basics of perl and converted it to my first log2tlimeline plugin. Since … Continue reading Log2timeline Plugin Creation


Digital Forensic SIFTing - Mounting Evidence Image Files

This is a series of blog articles that utilize the SIFT Workstation. The free SIFT workstation, can match any modern forensic tool suite, is also directly featured and taught in SANS' Advanced Computer Forensic Analysis and Incident Response course (FOR 508). SIFT demonstrates that advanced investigations and responding to intrusions can be accomplished using cutting-edge … Continue reading Digital Forensic SIFTing - Mounting Evidence Image Files